Liquid dispensing apparatus comprises a T-tube (9) of which the limb tube serves as a closed reservoir (8) for liquid, with an air space above. Liquid is pumped by a peristaltic pump (A) through a tube (6) and one arm of the T-tube into the reservoir until a level detector (D) responds to the liquid...http://www.google.es/patents/US4319568?utm_source=gb-gplus-sharePatente US4319568 - Liquid dispensing apparatus
